@ozzelot have a look for a Minolta 70-200/4 for creamy-smooth bokeh :)
may need some converting into your format, worth it.
@evilstevie
I've got various Canons with EF-S... Seems like a purely passive adapter can be 3D printed, even. Thanks for the tip :)
@evilstevie
(I mean, anything that can be made of plastic can potentially be 3D printed, but this was already designed by someone :D)
@ozzelot Aperture control is mechanical within the mount, focus and zoom have rings. heavy lens, check no oil on iris if you can
@ozzelot https://amzn.eu/d/0b4SizyO
tat-bazaar has you covered for ~40€ or so. lens will probably cost less